从高纯二氧化锗洗水中沉锗的工艺研究

Research on the Process of Germanium Precipitation in High-purity Germanium Dioxide Washing Water

本研究应用镁盐替代栲胶作为沉锗剂进行了富集锗的系统化条件试验,实验结果表明:在pH值8.0左右、温度45℃,镁盐沉锗剂的加入量为理论需用量2.5倍的条件下可获得理想的沉锗率和富集比;且镁盐沉锗法工艺简单、处理成本低、实用性强,在经济技术指标上显著优于栲胶沉锗工艺。

A systemic conditional test is carried out on germanium enrichment with magnesium salt as germanium precipitator in replacement of tannin extract. The test results show that under such conditions as pH value being around 8. 0, temperature at 45 ℃ and magnesium salt dosage being 2. 5 times of theoretical demand, an ideal germanium precipitation rate and enrichment ratio can be obtained;and the method of germanium precipitation using magnesium salt features simple process, low cost and strong practicality, much superior to that using tannin extract in terms of techno-economic indicators.